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Tiny cracks showing up in brand new window glass—normal or bad luck?

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sculptor15
Posts: 9
(@sculptor15)
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Couldn’t agree more—people jump to blaming the glass, but the frame and install play a massive role. I’ve seen high-end panes crack just from a slightly twisted sill or uneven shims. Even a hair off level can put weird stress on the corners. Sometimes folks forget that glass, even the tough stuff, doesn’t like being forced to fit. It’s wild how much difference a careful install makes... I’d double-check the opening before calling it bad luck.


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Posts: 11
(@sailing_william)
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I get where you're coming from, but I’ve seen manufacturing defects pop up even with a textbook install. Sometimes it’s microfractures from the tempering process or flaws in the lamination. Not every crack is from a bad fit—sometimes the glass itself is just off.


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Posts: 15
(@architecture_milo)
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Not every crack is from a bad fit—sometimes the glass itself is just off.

Yeah, I’ve run into that too. I had a triple-pane install a couple years back and noticed one of the inner panes had these hairline cracks after a month. Installer swore it was a manufacturing thing, not the install. Out of curiosity—did you notice any impact on condensation or drafts when you had those microfractures? Wondering if the energy rating drops even if the cracks are tiny.


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